Like Terry said, the "200" are rarely anywhere near 200cc. The Vespa should be really gutsy. I saw many folks riding Vespas all around the front range when we were in Denver and they even were sighted on some of the freeways doin' pretty well at keeping up. I'll stick with my DT300i since it should not be so much a PITA getting parts. Also it hauls my old, fat a$$ around pretty well. It may be a little short in leg room for a bigun like you. That is a common complaint from the biguns on this forum. I'm big around not vertically!
Karl